I have a Nikon D5300 with a Nikon 18-140mm f/3.5-5.6G ED VR AF-S... Will this work for dark ride pics at Disney World. I know the aperture is high with 3.5 but the ISO for this camera can be set 25600 . Also what settings would be good for fireworks,inside pics,parade,etc... Thank you,
No, it wouldn't work well for dark rides. First off, it's only 3.5 at 18mm. So you need to be totally zoomed out, to get the 3.5. That 3.5 is about 2 stops slower than most people use for low light lenses (1.4-1.8 lenses).
Secondly, while the camera might be capable of 25600, it will looks absolutely horrible. Take a look at the comparison shots on dpreview. At best, your 25600 shots can look okay as tiny low resolution webshots.
So purely in terms of exposure -- Using 25600 and 3.5, is about the same as someone else using 1.8 and 6400. So it can technically give you the right exposure, but 25600 will look horrible, while 6400 can still look decent.
As to your other question --- Settings vary significantly depending on more than just "parade." A parade at night will be very different than a parade on a sunny day. Are you close to the parade or far away? Do you want to capture specific elements and characters in detail during the parade, or do you want to get a wide shot of the whole parade? Do you plan on using a powerful flash?
Easier to answer for fireworks .... If you like the wonderful fireworks pics popping up on this board.. Such as this mediocre July 4th shot of mine...
untitled-31.jpg by
Havoc315, on Flickr
For shots like that... You need to set your camera on a tripod. Set the ISO to 100. Set a long shutter speed -- minimum of 5 seconds. Could go to 30 seconds or longer, but you would need an ND filter for that. Stop down the aperture --- f14 or smaller, depending on your shutter speed. Using a remote shutter release, or use your shutter timer, to prevent motion blur.